Sodium Coco Sulphate. Often used in 'natural' products to replace SLS but very similar to SLS (just slightly less processed)

Cocamidopropyl betaine (Coco-betaine), a foaming agent often used in ‘natural’ products which sounds like it is derived from coconut but is also derived from ‘dimethylaminopropylamine’ and isn’t completely plant-based. Potentially impacting non-renewable palm plantations. Has been claimed to be an allergen

Fragrance, which reflects a blend of ingredients and can mean synthetics or nasties are hidden – a labelling loophole – and known to causes headaches, rashes, respiratory problems and other reactions